This study is designed to prospectively collect matched blood and stool specimens and clinical data from screening guideline-eligible subjects found to have invasive colorectal cancer (CRC) at colonoscopy, i.e. AJCC/UICC stages I, II, III, and IV, with collection of specimens and testing after colonoscopy and from screening guideline-eligible subjects with blood and stool specimens collected before colonoscopy. A completed subject will have a FIT result, an Epi proColon result, and a medical diagnosis/colonoscopy determined clinical status (CRC, non-CRC). Demographic and baseline covariates will be reported for each individual.